<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row :gutter="10">
        <el-col :span="6">
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开行 -->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限和三级权限 -->
              <el-col :span="19">
                <!-- 通过 for循环 嵌套 渲染二级权限 -->
                <el-row
                  :class="[i2 !== 0 ? 'bdtop' : '', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      :class="[i3 !== 0 ? 'bdtop' : '']"
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"> </el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>
        <el-table-column prop="" label="操作" width="300">
          <template v-slot="scope">
            <!-- 修改按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row)"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeUserById(scope.row)"
              >删除</el-button
            >
            <!-- 权限按钮 -->
            <el-button
              type="warning"
              icon="el-icon-setting"
              size="mini"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加用户对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addFrom"
        :rules="addFromRules"
        ref="addFromRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addFrom.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addFrom.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 编辑用户对话框 -->
    <el-dialog
      title="修改用户"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editFrom"
        :rules="addFromRules"
        ref="editFromRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editFrom.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editFrom.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="defKeys = []"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="TreeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 添加表单的验证规则对象
      addFromRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '用户名的长度在 2 到 20 个字符',
            trigger: 'blur'
          }
        ]
      },
      // 添加用户的表单数据
      addFrom: {
        roleName: '',
        roleDesc: ''
      },
      // 查询到的用户信息对象
      editFrom: {},
      //  所有权限的数据
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的ID值数组
      defKeys: [],
      // 当前即将分配权限的角色
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200)
        return this.$message.error('获取角色列表失败!')
      this.rolelist = res.data
    },
    // 监听添加用户表单框关闭
    addDialogClosed() {
      this.$refs.addFromRef.resetFields()
    },
    // 添加用户
    addUser() {
      this.$refs.addFromRef.validate(async valid => {
        if (!valid) return
        // 可以发起添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addFrom)
        console.log(res)
        if (res.meta.status !== 201) return this.$message.error('添加角色失败')
        this.$message.success('添加角色成功')
        //重新获取角色列表
        this.getRolesList()
        //隐藏添加用户的对话框
        this.addDialogVisible = false
      })
    },
    // 显示修改用户的对话框
    async showEditDialog({ id }) {
      this.editDialogVisible = true
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200)
        return this.$message.error('查询用户信息失败')
      this.editFrom = res.data
    },
    // 监听修改框关闭事件
    editDialogClosed() {
      this.$refs.editFromRef.resetFields()
    },
    // 修改用户并提交
    editUserInfo() {
      this.$refs.editFromRef.validate(async valid => {
        if (!valid) return
        // 可以发起网络请求
        const { data: res } = await this.$http.put(
          'roles/' + this.editFrom.roleId,
          this.editFrom
        )
        console.log(res)
        if (res.meta.status !== 200)
          return this.$message.error('修改用户信息失败！')
        this.$message.success('修改用户信息成功!')
        // 显示修改用户信息的对话框
        this.editDialogVisible = false
        // 重新获取用户信息
        this.getRolesList()
      })
    },
    // 根据ID删除用户
    async removeUserById({ id }) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      console.log(confirmResult)
      // 如果取消返回值是cancel
      // 如果确认返回值是confirm
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除')
      // 用户点击了确认
      const { data: res } = await this.$http.delete('roles/' + id)
      console.log(res)
      if (res.meta.status !== 200) return this.$message.error('删除角色失败!')
      this.$message.success('删除角色成功!')
      //重新发起请求获得角色列表
      this.getRolesList()
    },
    // 根据ID删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示是否确定删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该权限, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      console.log(confirmResult)
      // 如果取消返回值是cancel
      // 如果确认返回值是confirm
      if (confirmResult !== 'confirm') return this.$message.info('已取消删除!')
      console.log(role.id, rightId)
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) return this.$message.error('取消权限失败!')
      this.$message.success('取消权限成功!')
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200)
        return this.$message.error('获取权限列表失败!')
      // 把获取到的权限数据保存到data中
      this.rightsList = res.data
      // 递归获取三级节点的信息
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
      this.roleId = role.id
    },
    // 通过递归的形式,获取角色下所有三级权限的ID，并到存到defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含childern 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      } else {
        node.children.forEach(item => this.getLeafKeys(item, arr))
      }
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.TreeRef.getHalfCheckedKeys(),
        ...this.$refs.TreeRef.getCheckedKeys()
      ]
      let idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr
        }
      )
      console.log(res)
      if (res.meta.status !== 200)
        return this.$message.error('分配角色权限失败!')
      this.$message.success('分配角色权限成功！')
      this.setRightDialogVisible = false
      this.getRolesList()
    }
  }
}
</script>

<style lang="scss" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>